Berlin 2012 – wissenschaftliches Programm
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MM: Fachverband Metall- und Materialphysik
MM 9: Topical Session Bulk Nanostrucured Materials II - Processing
MM 9.4: Vortrag
Montag, 26. März 2012, 12:45–13:00, H 0107
SPD processed ß-TiNb alloys for biomedical applications — •Ajit Panigrahi1, Thomas Waitz1, Erhard Schafler1, Matthias Bönisch2, Mariana Calin2, Annett Gebert2, Jürgen Eckert2, 3, Werner Skrotzki4, and Michael Zehetbauer1 — 1Physics of Nanostructured Materials, Faculty of Physics, University of Vienna, Austria — 2Institut für Komplexe Materialien, IFW Dresden, Germany — 3Institut für Werkstoffwissenschaft, TU Dresden, Germany — 4Institut für Strukturphysik, TU Dresden, Germany
The scientific goals of the recently established EU MC training network ``BioTiNet'' comprise the development of nanocrystalline and amorphous ß-Ti alloys for medical implants. Using methods of severe plastic deformation, it is the aim to process novel materials that show a tailored combination of high strength, considerable ductility, biocompatibility and low Young's modulus. A low value of Young's modulus of the ß-Ti-Nb alloys close to that of bone is a prerequisite for applications as materials for prosthesis minimizing stress shielding effects. ß-Ti-Nb based alloys including ``gum metals'' are of special interest. These materials also offer the possibility to accommodate elastic strains via superelasticity occurring by a martensitic phase transformation. This work reports on first results obtained by mechanical investigations of ß-Ti-Nb alloys of selected compositions which have been processed by HPT and ARB. X-ray profile analyses using synchrotron radiation is used to analyse the mechanisms of plastic deformation where dislocations seem to play only a minor role. Work supported within the EU Programme FP7/2007-13 under grant agreement No. 264635 (BioTiNet-ITN)